Check out this site if you’re interested in placing some home automation tools, such as light switches, water valves, window / door sensors, or maybe things like home servers or home security cameras.
Most things can be accessed from anywhere in the world, plus the added bonus of sharing certain devices out to friends and family. So, if you’re a photographer (or a wannabe), you can easily share out your photos to friends and family from your own home server.
Water valve busts in your hose while you’re away? The Z-Wave valve can automatically shutoff water to your home, and send you an email and SMS message of what happened, and tell you that it shut off the water to prevent costly repairs (all while you’re not even home!)
Pretty slick stuff!